Does its job

In test, but seems easy to use and working well.
I use it for regain the OLD Youtube interface and keept my Youtube addons and userscripts working on it.
By example this one:
Youtube - Restore Classic
https://greasyfork.org/fr/scripts/34818-youtube-restore-classic
MORE Infos:
Disable Polymer not working anymore: If the extensions and scripts aren't working for you, try this workaround:
https://www.reddit.com/r/youtube/comments/h9kpbp/disable_polymer_not_working_anymore/fuzp9k4/

Thank you for fixing Youtube.

I use this for reverting YouTube back to classic template by telling YouTube that my browser is Google Bot.

Been using this for over a year. Never had an issue, always works as expected, and the override for domain feature is very handy. A+ 10/10, would install again. Best User Agent extension out there.

Brillant. Easy to install. Works straight away. Thank you

This one works flawless! Was recommended at privacytools.io that how I found this. Should be on Mozilla Recommended Extensions too.

非常好用的扩展,作为web开发人员经常要用到

有时候就要用到。很依赖了。现在担心Mozilla 扩展推荐计划。这个鬼计划会让作者失去更新的计划

Works pretty well! It would be nice to have a list of websites/domains that overrides have been configured for.

Absolument PARFAIT ! Ne demande aucun redémarrage de Firefox, pour ma part a permis d’accéder à un site qui ne supportait pas Firefox et me demandais chrome. Ravie !!